Fuji Electric FRENIC-Ace series, User Manual

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7.1 Inspection Interval
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Perform daily and periodic inspections to avoid trouble and keep reliable operation of the inverter for a long time.
When performing inspections, follow the instructions given in this chapter.
• Before proceeding to the maintenance/inspection jobs, turn OFF the power and wait at least five minutes for
inverters FRN0115E2 ■ -2

/ FRN0072E2 ■ -4

/ FRN0011E2 ■ -7

or below, or at least ten minutes for
inverters FRN0085E2 ■ -4

or above. Make sure that the LED monitor / charging lamp are turned OFF.
Further, make sure, using a multimeter or a similar instrument, that the DC link bus voltage between the
terminals P(+) and N(-) has dropped to the safe level (+25 VDC or below).
Electric shock may occur.
• Maintenance, inspection, and parts replacement should be made only by authorized persons.
• Take off the watch, rings and other metallic objects before starting work.
• Use insulated tools.
• Never modify the inverter.
Electric shock or injuries could occur.
7.1 Inspection Interval
Table 7.1-1 lists the inspection intervals and check items, as a guide.
Table 7.1-1 List of Inspections
Inspection type Inspection interval Check items
Daily inspection Every day See Section 7.2 .
Periodic inspection Every year See Section 7.3 .
Decennial inspection * 1 Every 10 years * 2 Replacement of cooling fans * 3
Replacement of DC link bus capacitors and close
checks
*1 The decennial inspection (except replacement of cooling fans) should be performed only by the persons who
have finished the Fuji Electric training course. Contact the sales agent where you purchased the product or
your nearest Fuji Electric representative.
*2 Every 7 years for ND-mode inverters.
*3 For the standard replacement interval of cooling fans, refer to “7.4 List of Periodic Replacement Parts.”
The replacement intervals are based on the inverter’s service life estimated at an ambient temperature of
40°C at 100% (HHD-mode inverters) or 80% (ND-/HD-/HND-mode inverters) of full load. In environments
with an ambient temperature above 40°C or a large amount of dust or dirt, the replacement intervals may
be shorter.
Standard replacement intervals mentioned above are only a guide for replacement, not a guaranteed
service life. Refer to “7.4 List of Periodic Replacement Parts.”